Methodology & data sources
We try to be transparent about where our numbers come from and what they mean, so an alert is something you can trust.
Where the prices come from
We read prices from a range of public flight-search sources and airline sites where they are available. We do not buy a private data feed, and we do not invent prices.
How we check
Each watched route is re-checked on a recurring schedule. We search the exact route and date window you chose, take the cheapest qualifying fare from each source, and keep the lowest as that check's result. If a source is temporarily unreachable, we skip it for that cycle rather than guessing.
How prices are normalized
Sources can quote different currencies. We convert every fare to US dollars so history is comparable over time, and we record whether a price was read directly in USD or converted. All prices shown are in USD.
How we decide a price "dropped"
A single low number is not enough on its own. We compare the current fare against that route's own history: its all-time low and its recent rolling average. We notify you when a fare falls below your maximum, sets a new low, or drops far enough below its recent average to stand out. This is why a brand-new route needs a little history before its first alert.
Limitations
Prices change constantly and can sell out between a check and your booking. Fares may exclude bags or seat selection, and self-transfer itineraries can require re-checking bags. Always confirm the final price and conditions on the airline or booking site before you pay.